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The move comes two months after the Western Slope Republican was pulled over on Jan. 25 on suspicion of drunk driving by Denver police.

Officers on the scene said Bradford, of Collbran, failed a field sobriety test but officers let her leave on foot, citing legislative immunity as their reason for doing so. The incident raised questions about whether she received preferential treatment.

Bradford maintained that she told police to treat her like a regular citizen, but House leaders convened an ethics panel to review the incident. Bradford was cleared of ethical misconduct, but two other Republicans planned to challenge her in a district considered safe for the GOP.

Bradford says she is putting her family first in her decision. She plans to care for her husband, who recently suffered a heart attack.